US8587962B2 - Compensation for electrical converter nonlinearities - Google Patents
Compensation for electrical converter nonlinearities Download PDFInfo
- Publication number
- US8587962B2 US8587962B2 US12/941,521 US94152110A US8587962B2 US 8587962 B2 US8587962 B2 US 8587962B2 US 94152110 A US94152110 A US 94152110A US 8587962 B2 US8587962 B2 US 8587962B2
- Authority
- US
- United States
- Prior art keywords
- voltage
- estimated
- node
- conversion module
- interface
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related, expires
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33507—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0016—Control circuits providing compensation of output voltage deviations using feedforward of disturbance parameters
Definitions
- the first energy conversion module 104 converts the high-frequency energy at nodes 122 , 124 to DC energy that is provided to the DC energy source 118 at the DC interface 102 .
- the first energy conversion module 104 operates as a rectifier when converting high frequency AC energy to DC energy.
- the first energy conversion module 104 comprises four switching elements ( 9 - 12 ) with each switching element having a diode ( 29 - 32 ) configured antiparallel to the respective switching element to accommodate bidirectional energy delivery.
- a capacitor 126 is configured electrically in parallel across the DC interface 102 to reduce voltage ripple at the DC interface 102 , as will be appreciated in the art.
- the control module 116 generates a PWM duty cycle control value that controls the duty cycle of the switches 1 - 8 to implement the appropriate switching pattern during a switching interval (e.g., the inverse of the switching frequency).
- a switching interval e.g., the inverse of the switching frequency
- the control module 116 alternates between operating the switches 1 - 8 to effectively short-circuit nodes 132 , 138 and cycle energy through the matrix conversion module 108 to apply a voltage across the inductor 110 before operating the switches 1 - 8 to release the stored energy and/or voltage of the inductor 110 (alternatively, the fly-back voltage).
- the control module 116 obtains measured instantaneous values for the inductor current (i L ), the capacitor current (i CAP ), the input voltage (V AC ) at the input interface 114 , and the output voltage (V DC ) at the output interface 102 that are sampled, measured, or otherwise obtained at a particular instant in time during a current PWM cycle, wherein the PWM duty cycle control value determined by the control module 116 governs operation of the electrical converter during the subsequent PWM cycle.
- FIG. 1 is a simplified representation of an electrical system 100 for purposes of explanation and is not intended to limit the scope or applicability of the subject matter described herein in any way.
- FIG. 1 depicts direct electrical connections between circuit elements and/or terminals, alternative embodiments may employ intervening circuit elements and/or components while functioning in a substantially similar manner.
- the electrical system 100 is described herein in the context of a matrix conversion module 108 for a vehicle, the subject matter is not intended to be limited to vehicular and/or automotive applications, and the subject matter described herein may be implemented in other applications where an energy conversion module is utilized to transfer energy using switching elements or in other electrical systems where feedforward control schemes are utilized to achieve power factor correction by modeling the input interface as a loss-free resistor.
- a gain block 240 multiplies the estimated diode voltage by four to obtain a total estimated diode voltage drop when delivering energy to the DC interface 102 , because two diodes of diodes 21 - 28 of the matrix conversion module 108 and two diodes of diodes 29 - 32 of the first energy conversion module 104 conduct current when delivering energy to the DC interface 102 during a PWM cycle, as described above and in greater detail below.
- the current flowing through the diodes 29 - 32 of the first energy conversion module 104 is substantially equal to the current flowing through the diodes 21 - 28 (neglecting any capacitive and/or magnetic losses).
- the control process 300 continues by determining an input voltage reference for the input voltage at the input interface to produce the desired output voltage at the output interface (task 312 ).
- the control module 116 and/or control system 200 determines an output energy error value based on a difference between a square of the desired DC output voltage (V REF 2 ) and a square of the measured DC output voltage (V DC 2 ), and generates a desired input power reference value for producing the desired voltage (V REF ) at the DC interface 102 based on the output energy error value.
Abstract
Description
adding the estimated voltages across the switch and diode, and multiplying the result by two, because two switches and two diodes conduct one half of the inductor current from/to
and the sum of the second time period and the fourth time period divided by the sum of the four time periods corresponds to the duty cycle (e.g.,
Claims (19)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/941,521 US8587962B2 (en) | 2010-11-08 | 2010-11-08 | Compensation for electrical converter nonlinearities |
DE201110085672 DE102011085672A1 (en) | 2010-11-08 | 2011-11-03 | Compensation for nonlinearities of electrical converters or power converters |
CN201110349850.9A CN102468772B (en) | 2010-11-08 | 2011-11-08 | Compensation for electrical converter nonlinearities |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/941,521 US8587962B2 (en) | 2010-11-08 | 2010-11-08 | Compensation for electrical converter nonlinearities |
Publications (2)
Publication Number | Publication Date |
---|---|
US20120112549A1 US20120112549A1 (en) | 2012-05-10 |
US8587962B2 true US8587962B2 (en) | 2013-11-19 |
Family
ID=45971323
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/941,521 Expired - Fee Related US8587962B2 (en) | 2010-11-08 | 2010-11-08 | Compensation for electrical converter nonlinearities |
Country Status (3)
Country | Link |
---|---|
US (1) | US8587962B2 (en) |
CN (1) | CN102468772B (en) |
DE (1) | DE102011085672A1 (en) |
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US10312798B2 (en) | 2016-04-15 | 2019-06-04 | Emerson Electric Co. | Power factor correction circuits and methods including partial power factor correction operation for boost and buck power converters |
US10437317B2 (en) | 2016-04-15 | 2019-10-08 | Emerson Climate Technologies, Inc. | Microcontroller architecture for power factor correction converter |
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